Pen Druid Brewing focuses on wild fermentation, barrel fermenting and aging, traditional spontaneous fermentation and naturally carbonated beers. The brewery is owned and operated by the three brothers Lain, Van and Jennings Carney who are in the psych-rock band Pontiak.

The brothers have spent nearly a decade traveling North America and Europe, playing music and experiencing the local beer traditions. They've released 11 albums on the legendary Chicago independent record label Thrill Jockey Records. In between tours they would brew beer at home.

The name, Pen Druid, comes from their old family farm which sits on the Thornton River in Rappahannock County, Virginia, just a few miles downstream from the brewery.

In the winter 2015/2016 the brothers isolated their own cocktail of wild yeasts and bacteria from the Virginia Piedmont reflecting the terroir of Rappahannock. And in that spirit of capturing the terroir of the Rappahannock Piedmont, the brothers also began their spontaneous fermentation program which employ two copper-lined coolships.

Pen Druid is a 10bbl woodfired brewery. All kegs and bottles are naturally carbonated using secondary fermentation in the bottle or the keg.

They opened Pen Druid Brewing in August 2015 initially partnering with Jonathan Staples from Black Hops farm.